Let say I have ProjectX which is already available on app store. Then after how many months there is a major updates. I decided to make another xcode file project which is named also as ProjectX (but newer version).
So my question is, Is this possible? Can I upload this project directly to ItunesConnect as a newer version? Is there any settings I should set that would proportion to the same settings of the current version (ex.App ID,certificates,provisioning,etc).
Absolutely, you will need to download the App's certificates from the developer portal and import them into the project. From there, you will need to change the App's version number and make sure it's bundle identifier matches the one on the App store.